U.S. patent application number 17/298962 was filed with the patent office on 2022-02-03 for terminal apparatus, base station apparatus, and communication method.
The applicant listed for this patent is FG Innovation Company Limited, Sharp Kabushiki Kaisha. Invention is credited to Taewoo LEE, Huifa LIN, Daiichiro NAKASHIMA, Toshizo NOGAMI, Wataru OUCHI, Shoichi SUZUKI, Tomoki YOSHIMURA.
Application Number | 20220039131 17/298962 |
Document ID | / |
Family ID | |
Filed Date | 2022-02-03 |
United States Patent
Application |
20220039131 |
Kind Code |
A1 |
LIN; Huifa ; et al. |
February 3, 2022 |
TERMINAL APPARATUS, BASE STATION APPARATUS, AND COMMUNICATION
METHOD
Abstract
It is possible to efficiently perform uplink transmission. A
terminal apparatus includes a receiver configured to receive a
PDCCH and receive a PDSCH scheduled based at least on the PDCCH, in
which either a first generation method or a second generation
method is selected as a method for generating a HARQ-ACK codebook,
in the HARQ-ACK codebook, as the first generation method, a
HARQ-ACK information bit is set to an NACK, the HARQ-ACK
information bit corresponding to a PDSCH that is not associated
with the HARQ-ACK codebook according to a HARQ-ACK timing based on
the certain information, and the second generation method is
different from the first generation method.
Inventors: |
LIN; Huifa; (Sakai City,
JP) ; SUZUKI; Shoichi; (Sakai City, JP) ;
NAKASHIMA; Daiichiro; (Sakai City, JP) ; NOGAMI;
Toshizo; (Sakai City, JP) ; OUCHI; Wataru;
(Sakai City, JP) ; YOSHIMURA; Tomoki; (Sakai City,
JP) ; LEE; Taewoo; (Sakai City, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Sharp Kabushiki Kaisha
FG Innovation Company Limited |
Sakai City, Osaka
Tuen Mun, New Territories |
|
JP
HK |
|
|
Appl. No.: |
17/298962 |
Filed: |
December 2, 2019 |
PCT Filed: |
December 2, 2019 |
PCT NO: |
PCT/JP2019/047052 |
371 Date: |
June 2, 2021 |
International
Class: |
H04W 72/12 20060101
H04W072/12; H04L 1/18 20060101 H04L001/18; H04L 5/00 20060101
H04L005/00; H04W 72/04 20060101 H04W072/04 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 18, 2018 |
JP |
2018-236425 |
Claims
1. A terminal apparatus comprising: a receiver configured to
receive a PDCCH and receive a PDSCH scheduled based at least on the
PDCCH, wherein either a first generation method or a second
generation method is selected as a method for generating a HARQ-ACK
codebook, in the HARQ-ACK codebook, as the first generation method,
a HARQ-ACK information bit is set to an NACK, the HARQ-ACK
information bit corresponding to a PDSCH that is not associated
with the HARQ-ACK codebook according to a HARQ-ACK timing based on
the certain information, and the second generation method is
different from the first generation method.
2. The terminal apparatus according to claim 1, wherein in the
HARQ-ACK codebook, as the second generation method, a part or an
entirety of a plurality of the HARQ-ACK information bits are set as
valid HARQ-ACK information, the plurality of the HARQ-ACK
information bits corresponding to the PDSCH that is not associated
with the HARQ-ACK codebook according to the HARQ-ACK timing based
on the certain information.
3. The terminal apparatus according to claim 1, wherein switching
between the first generation method and the second generation
method is indicated based at least on a higher layer parameter, a
trigger by a DCI, an operation type of a radio access, or a
frequency band type of a radio access.
4. The terminal apparatus according to claim 1, wherein switching
between the first generation method and the second generation
method is indicated based on a prescribed higher layer parameter
and/or a prescribed value of a certain higher layer.
5. The terminal apparatus according to claim 1, wherein switching
between the first generation method and the second generation
method is indicated based on the PDCCH and/or a DCI included in a
different PDCCH.
6. The terminal apparatus according to claim 1, wherein switching
between the first generation method and the second generation
method is indicated based on an operation type (either a licensed
operation or an unlicensed operation) of a radio access.
7. The terminal apparatus according to claim 1, wherein switching
between the first generation method and the second generation
method is indicated based on a frequency band type (either a
frequency band to be allocated to a licensed operation or a
frequency band to be allocated to an unlicensed operation) of a
radio access.
8. A base station apparatus comprising: a transmitter configured to
transmit a PDCCH and transmit a PDSCH scheduled based at least on
the PDCCH, wherein either a first reception processing method or a
second reception processing method is selected as a method for
receiving a HARQ-ACK codebook, in the HARQ-ACK codebook, as the
first reception processing method, a HARQ-ACK information bit is
set to an NACK, the HARQ-ACK information bit corresponding to a
PDSCH that is not associated with the HARQ-ACK codebook according
to a HARQ-ACK timing based on the certain information, and in the
HARQ-ACK codebook, as the second reception processing method, a
part or an entirety of a plurality of the HARQ-ACK information bits
are set as valid HARQ-ACK information, the plurality of the
HARQ-ACK information bits corresponding to the PDSCH that is not
associated with the HARQ-ACK codebook according to the HARQ-ACK
timing based on the certain information.
9. A communication method used by a terminal apparatus, the method
comprising the steps of: receiving a PDCCH and receiving a PDSCH
scheduled based at least on the PDCCH; selecting either a first
generation method or a second generation method as a method for
generating a HARQ-ACK codebook; reporting (transmitting) the
HARQ-ACK codebook including HARQ-ACK information corresponding to
the PDSCH via a PUCCH or a PUSCH based on a timing indicated by a
value set to certain information, the HARQ-ACK codebook being a
sequence of HARQ-ACK information bits corresponding to one or a
plurality of the PDSCHs; determining the HARQ-ACK codebook
including at least a HARQ-ACK information bit corresponding to the
PDSCH; setting, in the HARQ-ACK codebook, as the first generation
method, a HARQ-ACK information bit to an NACK, the HARQ-ACK
information bit corresponding to a PDSCH that is not associated
with the HARQ-ACK codebook according to a HARQ-ACK timing based on
the certain information; and setting, in the HARQ-ACK codebook, as
the second generation method, a part or an entirety of a plurality
of the HARQ-ACK information bits as valid HARQ-ACK information, the
plurality of the HARQ-ACK information bits corresponding to the
PDSCH that is not associated with the HARQ-ACK codebook according
to the HARQ-ACK timing based on the certain information.
10. A communication method used by a base station apparatus, the
method comprising the steps of: transmitting a PDCCH and
transmitting a PDSCH scheduled based at least on the PDCCH;
selecting either a first reception processing method or a second
reception processing method as a method for receiving a HARQ-ACK
codebook; receiving the HARQ-ACK codebook including HARQ-ACK
information corresponding to the PDSCH via a PUCCH or a PUSCH based
on a timing indicated by a value set to certain information, the
HARQ-ACK codebook being a sequence of HARQ-ACK information bits
corresponding to one or a plurality of the PDSCHs; setting, in the
HARQ-ACK codebook, as the first reception processing method, a
HARQ-ACK information bit to an NACK, the HARQ-ACK information bit
corresponding to a PDSCH that is not associated with the HARQ-ACK
codebook according to a HARQ-ACK timing based on the certain
information; and setting, in the HARQ-ACK codebook, as the second
reception processing method, a part or an entirety of a plurality
of the HARQ-ACK information bits as valid HARQ-ACK information, the
plurality of the HARQ-ACK information bits corresponding to the
PDSCH that is not associated with the HARQ-ACK codebook according
to the HARQ-ACK timing based on the certain information.
Description
TECHNICAL FIELD
[0001] The present invention relates to a terminal apparatus, a
base station apparatus, and a communication method. This
application claims priority based on JP 2018-236425 filed on Dec.
18, 2018, the contents of which are incorporated herein by
reference.
BACKGROUND ART
[0002] In the 3.sup.rd Generation Partnership Project (3GPP), a
radio access method and a radio network for cellular mobile
communications (hereinafter referred to as "Long Term Evolution
(LTE)" or "Evolved Universal Terrestrial Radio Access (EUTRA)")
have been studied. In LTE, a base station apparatus is also
referred to as an evolved NodeB (eNodeB), and a terminal apparatus
is also referred to as User Equipment (UE). LTE is a cellular
communication system in which a plurality of areas covered by a
base station apparatus are distributed in a cell structure. A
single base station apparatus may manage a plurality of serving
cells.
[0003] 3GPP has been studying a next generation standard (New Radio
or NR) (NPL 1) to make a proposal for International Mobile
Telecommunication (IMT)-2020, a standard for a next generation
mobile communication system developed by the International
Telecommunication Union (ITU). NR is required to satisfy
requirements for three use cases including enhanced Mobile
BroadBand (eMBB), massive Machine Type Communication (mMTC), and
Ultra Reliable and Low Latency Communication (URLLC) in a single
technology framework.
CITATION LIST
Non Patent Literature
[0004] NPL 1: "New SID proposal: Study on New Radio Access
Technology", RP-160671, NTT docomo, 3GPP TSG RAN Meeting #71,
Goteborg, Sweden, 7th to 10th March, 2016.
SUMMARY OF INVENTION
Technical Problem
[0005] One aspect of the present invention provides a terminal
apparatus that efficiently performs communication, a communication
method used for the terminal apparatus, a base station apparatus
that efficiently performs communication, and a communication method
used for the base station apparatus.
Solution to Problem
[0006] (1) According to a first aspect of the present invention,
there is provided a terminal apparatus including a receiver
configured to receive a PDCCH and receive a PDSCH scheduled based
at least on the PDCCH, in which either a first generation method or
a second generation method is selected as a method for generating a
HARQ-ACK codebook, in the HARQ-ACK codebook, as the first
generation method, a HARQ-ACK information bit is set to an NACK,
the HARQ-ACK information bit corresponding to a PDSCH that is not
associated with the HARQ-ACK codebook according to a HARQ-ACK
timing based on the certain information, and the second generation
method is different from the first generation method.
[0007] (2) According to a second aspect of the present invention,
there is provided a base station apparatus including a transmitter
configured to transmit a PDCCH and transmit a PDSCH scheduled based
at least on the PDCCH, and a receiver configured to select either a
first reception processing method or a second reception processing
method as a method for receiving a HARQ-ACK codebook and receive
the HARQ-ACK codebook including HARQ-ACK information corresponding
to the PDSCH via a PUCCH or a PUSCH based on a timing indicated by
a value set to certain information, in which the HARQ-ACK codebook
is a sequence of HARQ-ACK information bits corresponding to one or
a plurality of the PDSCHs, in the HARQ-ACK codebook, as the first
reception processing method, a HARQ-ACK information bit is set to
an NACK, the HARQ-ACK information bit corresponding to a PDSCH that
is not associated with the HARQ-ACK codebook according to a
HARQ-ACK timing based on the certain information, and, in the
HARQ-ACK codebook, as the second reception processing method, a
part or an entirety of a plurality of the HARQ-ACK information bits
are set as valid HARQ-ACK information, the plurality of the
HARQ-ACK information bits corresponding to the PDSCH that is not
associated with the HARQ-ACK codebook according to the HARQ-ACK
timing based on the certain information.
[0008] (3) According to a third aspect of the present invention,
there is provided a communication method used by a terminal
apparatus, the method including the steps of receiving a PDCCH and
receiving a PDSCH scheduled based at least on the PDCCH, selecting
either a first generation method or a second generation method as a
method for generating a HARQ-ACK codebook, reporting (transmitting)
the HARQ-ACK codebook including HARQ-ACK information corresponding
to the PDSCH via a PUCCH or a PUSCH based on a timing indicated by
a value set to certain information, the HARQ-ACK codebook being a
sequence of HARQ-ACK information bits corresponding to one or a
plurality of the PDSCHs, determining the HARQ-ACK codebook
including at least a HARQ-ACK information bit corresponding to the
PDSCH, setting, in the HARQ-ACK codebook, as the first generation
method, a HARQ-ACK information bit to an NACK, the HARQ-ACK
information bit corresponding to a PDSCH that is not associated
with the HARQ-ACK codebook according to a HARQ-ACK timing based on
the certain information, and setting, in the HARQ-ACK codebook, as
the second generation method, a part or an entirety of a plurality
of the HARQ-ACK information bits as valid HARQ-ACK information, the
plurality of the HARQ-ACK information bits corresponding to the
PDSCH that is not associated with the HARQ-ACK codebook according
to the HARQ-ACK timing based on the certain information.
[0009] (4) According to a fourth aspect of the present invention,
there is provided a communication method used by a base station
apparatus, the method including the steps of transmitting a PDCCH
and transmitting a PDSCH scheduled based at least on the PDCCH,
selecting either a first reception processing method or a second
reception processing method as a method for receiving a HARQ-ACK
codebook, receiving the HARQ-ACK codebook including HARQ-ACK
information corresponding to the PDSCH via a PUCCH or a PUSCH based
on a timing indicated by a value set to certain information, the
HARQ-ACK codebook being a sequence of HARQ-ACK information bits
corresponding to one or a plurality of the PDSCHs, setting, in the
HARQ-ACK codebook, as the first reception processing method, a
HARQ-ACK information bit to an NACK, the HARQ-ACK information bit
corresponding to a PDSCH that is not associated with the HARQ-ACK
codebook according to a HARQ-ACK timing based on the certain
information, and setting, in the HARQ-ACK codebook, as the second
reception processing method, a part or an entirety of a plurality
of the HARQ-ACK information bits as valid HARQ-ACK information, the
plurality of the HARQ-ACK information bits corresponding to the
PDSCH that is not associated with the HARQ-ACK codebook according
to the HARQ-ACK timing based on the certain information.
Advantageous Effects of Invention
[0010] According to one aspect of the present invention, the
terminal apparatus can efficiently perform communication. In
addition, the base station apparatus can efficiently perform
communication.
BRIEF DESCRIPTION OF DRAWINGS
[0011] FIG. 1 is a conceptual diagram of a radio communication
system according to an aspect of the present embodiment.
[0012] FIG. 2 is an example illustrating a relationship of
N.sup.slot.sub.symb, a subcarrier spacing configuration .mu., a
slot configuration, and a CP configuration according to an aspect
of the present embodiment.
[0013] FIG. 3 is a schematic diagram illustrating an example of a
resource grid in a subframe according to an aspect of the present
embodiment.
[0014] FIG. 4 is a schematic block diagram illustrating structure
of a terminal apparatus 1 according to an aspect of the present
embodiment.
[0015] FIG. 5 is a schematic block diagram illustrating structure
of a base station apparatus 3 according to an aspect of the present
embodiment.
[0016] FIG. 6 is a diagram illustrating a procedure for determining
a set of M.sub.A, c occasions for candidate PDSCH receptions
according to an aspect of the present embodiment.
[0017] FIG. 7 is a diagram illustrating a procedure in which a
terminal apparatus 1 determines a HARQ-ACK information bit of a
transmitted HARQ-ACK codebook according to an aspect of the present
embodiment.
[0018] FIG. 8 is a diagram illustrating a method in which the
terminal apparatus 1 determines a HARQ-ACK information bit of the
transmitted HARQ-ACK codebook according to an aspect of the present
embodiment.
DESCRIPTION OF EMBODIMENTS
[0019] Embodiments of the present invention will be described
below.
[0020] The fact that a parameter or information indicates one or a
plurality of values may mean that the parameter or the information
includes at least a parameter or information indicating the one or
the plurality of values. A higher layer parameter may be a single
higher layer parameter. The higher layer parameter may be an
Information Element (IE) including a plurality of parameters.
[0021] FIG. 1 is a conceptual diagram of a radio communication
system according to an aspect of the present embodiment. In FIG. 1,
the radio communication system includes terminal apparatuses 1A to
1C and a base station apparatus 3. Hereinafter, each of the
terminal apparatuses 1A to 1C is also referred to as a terminal
apparatus 1.
[0022] The base station apparatus 3 may be configured to include
one of or both a Master Cell Group (MCG) and a Secondary Cell Group
(SCG). The MCG is a group of serving cells configured to include at
least a Primary Cell (PCell). The SCG is a group of serving cells
configured to include at least a Primary Secondary Cell (PSCell).
The PCell may be a serving cell provided based on an initial
connection. The MCG may be configured to include one or a plurality
of Secondary Cells (SCells). The SCG may be configured to include
one or a plurality of SCells. A serving cell identity is a short
identity for identifying the serving cell. The serving cell
identity may be provided by a higher layer parameter.
[0023] Hereinafter, a frame structure will be described.
[0024] In the radio communication system according to an aspect of
the present embodiment, at least Orthogonal Frequency Division
Multiplex (OFDM) is used. The OFDM symbol is a unit of a time
domain of the OFDM. The OFDM symbol includes at least one or a
plurality of subcarriers. The OFDM symbol may be converted into a
time-continuous signal in baseband signal generation.
[0025] A SubCarrier Spacing (SCS) may be provided as a subcarrier
spacing .DELTA.f=2.mu.15 kHz. For example, a subcarrier spacing
configuration .mu. may be configured to be any of 0, 1, 2, 3, 4,
and/or 5. For a certain BandWidth Part (BWP), the subcarrier
spacing configuration .mu. may be provided by a higher layer
parameter.
[0026] In the radio communication system according to an aspect of
the present embodiment, a time unit T.sub.c is used for
representing a length of the time domain. The time unit T.sub.c may
be provided as T.sub.c=1/(.DELTA.f.sub.maxN.sub.f).
.DELTA.f.sub.max may be the maximum value of the subcarrier spacing
supported by the radio communication system according to an aspect
of the present embodiment. .DELTA.f.sub.max may satisfy
.DELTA.f.sub.max=480 kHz. N.sub.f may satisfy N.sub.f=4096. A
constant .kappa. satisfies
.kappa.=.DELTA.f.sub.maxN.sub.f/(.DELTA.f.sub.refN.sub.f, ref)=64.
.DELTA.f.sub.ref may be 15 kHz. N.sub.f, ref may be 2048.
[0027] The constant .kappa. may be a value indicating a
relationship between a reference subcarrier spacing and T.sub.c.
The constant .kappa. may be used for a length of a subframe. The
number of slots included in the subframe may be provided based at
least on the constant .kappa.. .DELTA.f.sub.ref is the reference
subcarrier spacing, and N.sub.f, ref is a value corresponding to
the reference subcarrier spacing.
[0028] Downlink transmission and/or uplink transmission includes
frames of 10 ms. A frame is configured to include 10 subframes. A
length of a subframe is 1 ms. The length of the frame may be
provided regardless of the subcarrier spacing .DELTA.f. In other
words, the frame configuration may be provided regardless of .mu..
The length of the subframe may be provided regardless of the
subcarrier spacing .DELTA.f. In other words, the configuration of
the subframe may be provided regardless of .mu..
[0029] For a certain subcarrier spacing configuration .mu., the
number and indexes of slots included in a subframe may be provided.
For example, a first slot number n.sup..mu..sub.s may be provided
in ascending order ranging from 0 to N.sup.subframe,
.mu..sub.slot-1 within a subframe. For the subcarrier spacing
configuration .mu., the number and indexes of slots included in a
frame may be provided. For example, a second slot number
n.sup..mu..sub.s, f may be provided in ascending order ranging from
0 to N.sup.frame, .mu..sub.slot-1 within a frame.
N.sup.slot.sub.symb continuous OFDM symbols may be included in one
slot. N.sup.slot.sub.symb may be provided based at least on a part
or an entirety of a slot configuration and/or a Cyclic Prefix (CP)
configuration. The slot configuration may be provided at least by a
higher layer parameter tdd-UL-DL-ConfigurationCommon. The CP
configuration may be provided based at least on a higher layer
parameter. The CP configuration may be provided based at least on
dedicated RRC signaling. Each of the first slot number and the
second slot number is also referred to as slot number (slot
index).
[0030] FIG. 2 is an example illustrating a relationship of
N.sup.slot.sub.symb, a subcarrier spacing configuration .mu., a
slot configuration, and a CP configuration according to an aspect
of the present embodiment. In FIG. 2A, in a case that the slot
configuration is zero, the subcarrier spacing configuration .mu. is
two, and the CP configuration is a normal cyclic prefix (normal
CP), N.sup.slot.sub.symb=14, N.sup.frame, .mu..sub.slot=40, and
N.sup.subframe, .mu..sub.slot=4. In addition, in FIG. 2B, in a case
that the slot configuration is zero, the subcarrier spacing
configuration .mu. is two, and the CP configuration is an extended
cyclic prefix (extended CP), N.sup.slot.sub.symb=12, N.sup.frame,
.mu..sub.slot=40, and N.sup.subframe, .mu..sub.slot=4. The value of
N.sup.slot.sub.symb in the slot configuration 0 may corresponds to
twice the value of N.sup.slot.sub.symb in the slot configuration
1.
[0031] Physical resources will be described below.
[0032] An antenna port is defined in such a manner that a channel
through which a symbol is transmitted at one antenna port can be
estimated from a channel through which another symbol is
transmitted at the same antenna port. In a case that a large scale
property of a channel through which a symbol is transmitted at one
antenna port can be estimated from a channel through which a symbol
is transmitted at another antenna port, the two antenna ports are
referred to as Quasi Co-Located (QCL). The large scale properties
may include at least a long term performance of a channel. The
large scale properties may include at least some or all of delay
spread, Doppler spread, Doppler shift, an average gain, an average
delay, and beam parameters (spatial Rx parameters). The fact that a
first antenna port and a second antenna port are QCL with respect
to a beam parameter may mean that a reception beam assumed by the
reception side for the first antenna port is the same as a
reception beam assumed by the reception side for the second antenna
port. The fact that the first antenna port and the second antenna
port are QCL with respect to a beam parameter may mean that a
transmission beam assumed by the reception side for the first
antenna port is the same as a transmission beam assumed by the
reception side for the second antenna port. In a case that a large
scale property of a channel through which a symbol is transmitted
at one antenna port can be estimated from a channel through which a
symbol is transmitted at another antenna port, the two antenna
ports may be assumed to be QCL in the terminal apparatus 1. The
fact that the two antenna ports are QCL may mean that the two
antenna ports are assumed to be QCL.
[0033] For each set of a subcarrier spacing configuration and a
carrier, a resource grid including N.sup..mu..sub.RB,
xN.sup.RB.sub.sc subcarriers and
N.sup.(.mu.).sub.symbN.sup.subframe, .mu..sub.symb OFDM symbols is
provided. N.sup..mu..sub.RB, x may indicate the number of resource
blocks provided for the subcarrier spacing configuration .mu. for a
carrier x. N.sup..mu..sub.RB, x may indicate the maximum number of
resource blocks provided for the subcarrier spacing configuration
.mu. for the carrier x. The carrier x indicates either a downlink
carrier or an uplink carrier. In other words, x is "DL" or "UL".
N.sup..mu..sub.RB is a name including N.sup..mu..sub.RB, DL and/or
N.sup..mu..sub.RB, UL. N.sup.RB.sub.sc may indicate the number of
subcarriers included in one resource block. At least one resource
grid may be provided for each antenna port p and/or for each
subcarrier spacing configuration .mu. and/or for each Transmission
direction configuration. The transmission direction includes at
least DownLink (DL) and UpLink (UL). Hereinafter, a set of
parameters including at least some or all of the antenna port p,
the subcarrier spacing configuration .mu., and the transmission
direction configuration is also referred to as a first radio
parameter set. In other words, one resource grid may be provided
for each first radio parameter set.
[0034] A carrier included in a serving cell in downlink is referred
to as a downlink carrier (or a downlink component carrier). A
carrier included in a serving cell in uplink is referred to as an
uplink carrier (uplink component carrier). A downlink component
carrier and an uplink component carrier are collectively referred
to as a component carrier (or a carrier).
[0035] Each element in the resource grid provided for each first
radio parameter set is referred to as a resource element. The
resource element is identified by an index k.sub.sc of the
frequency domain and an index l.sub.sym of the time domain. The
resource element is identified by an index k.sub.sc of the
frequency domain and an index l.sub.sym of the time domain for a
certain first radio parameter set. The resource element to be
identified by the index k.sub.sc of the frequency domain and the
index l.sub.sym of the time domain is also referred to as a
resource element (k.sub.sc, l.sub.sym). The index k.sub.sc of the
frequency domain indicates any value from 0 to
N.sup..mu..sub.RBN.sup.RB.sub.sc-1. N.sub.RB may be the number of
resource blocks provided for the subcarrier spacing configuration
.mu.. N.sup.RB.sub.sc is the number of subcarriers included in a
resource block, and N.sup.RB.sub.sc=12. The index k.sub.sc of the
frequency domain may correspond to a subcarrier index k.sub.sc. The
index l.sub.sym of the time domain may correspond to an OFDM symbol
index l.sub.sym.
[0036] FIG. 3 is a schematic diagram illustrating an example of a
resource grid in a subframe according to an aspect of the present
embodiment. In the resource grid in FIG. 3, the horizontal axis is
the index l.sub.sym of the time domain, and the vertical axis is
the index k.sub.sc of the frequency domain. In one subframe, the
frequency domain of the resource grid includes
N.sup..mu..sub.RBN.sup.RB.sub.sc subcarriers. In one subframe, the
time domain of the resource grid may include 142.mu. OFDM symbols.
One resource block is configured to include N.sup.RB.sub.sc
subcarriers. The time domain of the resource block may correspond
to one OFDM symbol. The time domain of the resource block may
correspond to 14 OFDM symbols. The time domain of the resource
block may correspond to one or a plurality of slots. The time
domain of the resource block may correspond to one subframe.
[0037] The terminal apparatus 1 may receive an indication of
transmission and/or reception using only a subset of resource
grids. The subset of resource grids is also referred to as a BWP,
and the BWP may be provided based at least on a part or an entirety
of the higher layer parameter and/or DCI. The BWP is also referred
to as a bandwidth part (BP). In other words, the terminal apparatus
1 may not receive an indication of transmission and/or reception
using all sets of resource grids. In other words, the terminal
apparatus 1 may receive an indication of transmission and/or
reception using some frequency resources within the resource grid.
One BWP may include a plurality of resource blocks in the frequency
domain. One BWP may include a plurality of resource blocks that are
continuous in the frequency domain. A BWP configured for a downlink
carrier is also referred to as a downlink BWP. A BWP configured for
an uplink carrier is also referred to as an uplink BWP.
[0038] One or a plurality of downlink BWPs may be configured for
the terminal apparatus 1. The terminal apparatus 1 may attempt to
receive a physical channel (for example, a PDCCH, a PDSCH, and/or
an SS/PBCH) in one downlink BWP out of the one or plurality of
downlink BWPs. The one downlink BWP is also referred to as an
active downlink BWP.
[0039] One or a plurality of uplink BWPs may be configured for the
terminal apparatus 1. The terminal apparatus 1 may attempt to
transmit a physical channel (for example, a PUCCH, a PUSCH, and/or
a PRACH) in one uplink BWP out of the one or plurality of uplink
BWPs. The one uplink BWP is also referred to as an active uplink
BWP.
[0040] A set of downlink BWPs may be configured for each serving
cell. The set of downlink BWPs may include one or a plurality of
downlink BWPs. A set of uplink BWPs may be configured for each
serving cell. The set of uplink BWPs may include one or a plurality
of uplink BWPs.
[0041] A higher layer parameter is a parameter included in a higher
layer signaling. The higher layer signaling may be Radio Resource
Control (RRC) signaling or a Medium Access Control (MAC) Control
Element (CE). Here, the higher layer signaling may be an RRC layer
signal or an MAC layer signal.
[0042] The higher layer signaling may be common RRC signaling. The
common RRC signaling may include at least some or all of the
following features C1 to C3. Feature C1) to be mapped to a BCCH
logical channel or a CCCH logical channel, or
[0043] Feature C2) to include at least a radioResourceConfigCommon
information element, or
[0044] Feature C3) to be mapped to a PBCH.
[0045] The radioResourceConfigCommon information element may
include information indicating a configuration commonly used in a
serving cell. The configuration commonly used in a serving cell may
include at least a PRACH configuration. The PRACH configuration may
indicate at least one or a plurality of random access preamble
indexes. The PRACH configuration may indicate at least a
time/frequency resource of the PRACH.
[0046] The higher layer signaling may be dedicated RRC signaling.
The dedicated RRC signaling may include at least some or all of the
following features D1 and D2.
[0047] Feature D1) to be mapped to a DCCH logical channel, or
[0048] Feature D2) to include at least a
radioResourceConfigDedicated information element.
[0049] The radioResourceConfigDedicated information element may
include at least information indicating a configuration specific to
the terminal apparatus 1. The radioResourceConfigDedicated
information element may include at least information indicating a
BWP configuration. The BWP configuration may indicate at least a
frequency resource of the BWP.
[0050] For example, a MIB, first system information, and second
system information may be included in the common RRC signaling. In
addition, a higher layer message that is mapped to the DCCH logical
channel and includes at least radioResourceConfigCommon may be
included in the common RRC signaling. In addition, a higher layer
message that is mapped to the DCCH logical channel and does not
include the radioResourceConfigCommon information element may be
included in the dedicated RRC signaling. In addition, a higher
layer message that is mapped to the DCCH logical channel and
includes at least the radioResourceConfigDedicated information
element may be included in the dedicated RRC signaling.
[0051] The first system information may indicate at least a time
index of a Synchronization Signal (SS) block. The SS block is also
referred to as an SS/PBCH block. The SS/PBCH block is also referred
to as an SS/PBCH. The first system information may include at least
information related to a PRACH resource. The first system
information may include at least information related to a
configuration of initial connection. The second system information
may be system information other than the first system
information.
[0052] The radioResourceConfigDedicated information element may
include at least information related to a PRACH resource. The
radioResourceConfigDedicated information element may include at
least information related to the configuration of initial
connection.
[0053] A physical channel and physical signal according to various
aspects of the present embodiment will be described below.
[0054] An uplink physical channel may correspond to a set of
resource elements that convey information generated in a higher
layer. The uplink physical channel is a physical channel used in
uplink carrier. In the radio communication system according to an
aspect of the present embodiment, at least some or all of the
uplink physical channels described below are used. [0055] Physical
Uplink Control CHannel (PUCCH) [0056] Physical Uplink Shared
CHannel (PUSCH) [0057] Physical Random Access CHannel (PRACH)
[0058] The PUCCH may be used to transmit Uplink Control Information
(UCI). The uplink control information includes some or all of
Channel State Information (CSI), a Scheduling Request (SR), and a
Hybrid Automatic Repeat request ACKnowledgement (HARQ-ACK)
corresponding to a transport block (TB, a Medium Access Control
Protocol Data Unit (MAC PDU), Downlink-Shared Channel (DL-SCH),
and/or a Physical Downlink Shared Channel (PDSCH)).
[0059] The HARQ-ACK may include at least a HARQ-ACK bit
corresponding at least to one transport block. The HARQ-ACK bit may
indicate an acknowledgement (ACK) or a negative-acknowledgement
(NACK) corresponding to one or a plurality of transport blocks. The
HARQ-ACK may include at least a HARQ-ACK codebook including one or
a plurality of HARQ-ACK bits. The fact that the HARQ-ACK bit
corresponds to one or a plurality of transport blocks may mean that
the HARQ-ACK bit corresponds to a PDSCH including the one or the
plurality of transport blocks.
[0060] The HARQ-ACK bit may indicate an ACK or NACK corresponding
to one Code Block Group (CBG) included in the transport block. The
HARQ-ACK is also referred to as HARQ feedback, HARQ information, or
HARQ control information.
[0061] The Scheduling Request (SR) may be used at least for
requesting a resource of a PUSCH for initial transmission. A
scheduling request bit may be used to indicate either a positive SR
or a negative SR. The scheduling request bit indicating the
positive SR is also referred to as "the positive SR being
transmitted". The positive SR may indicate that a resource of the
PUSCH for initial transmission is requested by the terminal
apparatus 1. The positive SR may indicate that a scheduling request
is triggered by the higher layer. The positive SR may be
transmitted in a case that the higher layer indicates transmission
of the scheduling request. The scheduling request bit indicating
the negative SR is also referred to as "the negative SR being
transmitted". The negative SR may indicate that the resource of the
PUSCH for initial transmission is not requested by the terminal
apparatus 1. The negative SR may indicate that the scheduling
request is not triggered by the higher layer. The negative SR may
be transmitted in a case that transmission of a scheduling request
is not indicated by the higher layer.
[0062] Channel state information may include at least some or all
of a Channel Quality Indicator (CQI), a Precoder Matrix Indicator
(PMI), and a Rank Indicator (RI). The CQI is an indicator related
to channel quality (for example, propagation intensity), and the
PMI is an indicator that indicates a precoder. The RI is an
indicator indicating a transmission rank (or the number of
transmission layers).
[0063] The PUCCH supports PUCCH formats (PUCCH formats 0 to 4). The
PUCCH formats may be mapped to the PUCCH and may then be
transmitted. The PUCCH format may be transmitted through the PUCCH.
The fact that the PUCCH format is transmitted may mean that the
PUCCH is transmitted.
[0064] The PUSCH may be used at least to transmit a transport block
((TB), the MAC PDU, a UL-SCH, and/or the PUSCH). The PUSCH may be
used to transmit at least some or all of the transport block, the
HARQ-ACK, the channel state information, and the scheduling
request. The PUSCH is used at least to transmit a random access
message 3.
[0065] The PRACH is used at least to transmit a random access
preamble (random access message 1). The PRACH may be used at least
to indicate some or all of an initial connection establishment
procedure, a handover procedure, a connection re-establishment
procedure, synchronization for PUSCH transmission (timing
adjustment), and a resource request for the PUSCH. The random
access preamble may be used to notify the base station apparatus 3
of an index (random access preamble index) provided by a higher
layer of the terminal apparatus 1.
[0066] In FIG. 1, the following uplink physical signals are used
for uplink radio communication. The uplink physical signals may not
be used to transmit information output from a higher layer, but is
used by a physical layer. [0067] UpLink Demodulation Reference
Signal (UL DMRS) [0068] Sounding Reference Signal (SRS) [0069]
UpLink Phase Tracking Reference Signal (UL PTRS)
[0070] The UL DMRS is associated with transmission of the PUSCH
and/or the PUCCH. The UL DMRS is multiplexed with the PUSCH or the
PUCCH. The base station apparatus 3 may use the UL DMRS in order to
perform channel compensation of the PUSCH or the PUCCH.
Hereinafter, transmission of both a PUSCH and a UL DMRS associated
with the PUSCH will be simply referred to as transmission of a
PUSCH. Hereinafter, transmission of both a PUCCH and a UL DMRS
associated with the PUCCH will be simply referred to as
transmission of a PUCCH. The UL DMRS associated with the PUSCH is
also referred to as a UL DMRS for a PUSCH. The UL DMRS associated
with the PUCCH is also referred to as a UL DMRS for a PUCCH.
[0071] The SRS may not be associated with transmission of the PUSCH
or the PUCCH. The base station apparatus 3 may use the SRS for
measuring a channel state. The SRS may be transmitted at the end of
a subframe in an uplink slot or at a prescribed number of OFDM
symbols from the end.
[0072] The UL PTRS may be a reference signal that is used at least
for phase tracking. The UL PTRS may be associated with a UL DMRS
group including at least an antenna port used for one or a
plurality of UL DMRSs. The fact that the UL PTRS associates with
the UL DMRS group may mean that at least the antenna port for the
UL PTRS and some or all of the antenna ports included in the UL
DMRS group are QCL. The UL DMRS group may be identified based at
least on the antenna port of the lowest index for the UL DMRS
included in the UL DMRS group. The UL PTRS may be mapped to the
antenna port of the smallest index from among one or more antenna
ports to which one codeword is mapped. The UL PTRS may be mapped to
a first layer in a case that one codeword is mapped at least to the
first layer and a second layer. The UL PTRS may not be mapped to
the second layer. The index of the antenna port to which the UL
PTRS is mapped may be provided based at least on the downlink
control information.
[0073] In FIG. 1, the following downlink physical channels are used
for downlink radio communication from the base station apparatus 3
to the terminal apparatus 1. The downlink physical channels are
used by the physical layer for transmission of information output
from a higher layer. [0074] Physical Broadcast Channel (PBCH)
[0075] Physical Downlink Control Channel (PDCCH) [0076] Physical
Downlink Shared Channel (PDSCH)
[0077] The PBCH is used at least to transmit a Master Information
Block ((MIB), and/or a Broadcast Channel (BCH)). The PBCH may be
transmitted based on a prescribed transmission interval. The PBCH
may be transmitted at an interval of 80 ms. The PBCH may be
transmitted at an interval of 160 ms. Contents of information
included in the PBCH may be updated at every 80 ms. A part or an
entirety of the information included in the PBCH may be updated at
every 160 ms. The PBCH may include 288 subcarriers. The PBCH may be
configured to include two, three, or four OFDM symbols. The MIB may
include information associated with an identity (index) of a
synchronization signal. The MIB may include information indicating
at least some of a slot number, a subframe number, and/or a radio
frame number in which a PBCH is transmitted.
[0078] The PDCCH is used at least to transmit Downlink Control
Information (DCI). The PDCCH may be transmitted with at least the
downlink control information included therein. The PDCCH may
include the downlink control information. The downlink control
information is also referred to as a DCI format. The downlink
control information may include at least either a downlink grant or
an uplink grant. The DCI format used for scheduling the PDSCH is
also referred to as a downlink DCI format. The DCI format used for
scheduling the PUSCH is also referred to as an uplink DCI format.
The downlink grant is also referred to as downlink assignment or
downlink allocation. The uplink DCI format includes at least one of
or both a DCI format 0_0 and a DCI format 0_1.
[0079] The DCI format 0_0 is configured to include at least some or
all of 1A to 1F.
[0080] 1A) DCI format specification field (Identifier for DCI
formats field)
[0081] 1B) Frequency domain resource assignment field
[0082] 1C) Time domain resource assignment field
[0083] 1D) Frequency hopping flag field
[0084] 1E) Modulation and Coding Scheme field (MCS field)
[0085] 1F) First CSI request field
[0086] The DCI format specification field may be used at least to
indicate which of one or a plurality of DCI formats the DCI format
including the DCI format specification field corresponds to. The
one or plurality of DCI formats may be provided based at least on
some or all of a DCI format 1_0, a DCI format 1_1, the DCI format
0_0, and/or the DCI format 0_1.
[0087] The frequency domain resource assignment field may be used
at least to indicate assignment of a frequency resource for the
PUSCH scheduled by the DCI format including the frequency domain
resource assignment field. The frequency domain resource assignment
field is also referred to as Frequency Domain Resource Allocation
(FDRA) field.
[0088] The time domain resource assignment field may be used at
least to indicate assignment of a time resource for the PUSCH
scheduled by the DCI format including the time domain resource
assignment field.
[0089] The frequency hopping flag field may be used at least to
indicate whether frequency hopping is to be applied to the PUSCH
scheduled by the DCI format including the frequency hopping flag
field.
[0090] The MCS field may be used at least to indicate some or all
of a modulation scheme for the PUSCH scheduled by the DCI format
including the MCS field and/or a target coding rate. The target
coding rate may be a target coding rate for a transport block of
the PUSCH. The size of the transport block (Transport Block Size
(TBS)) may be provided based at least on the target coding
rate.
[0091] The first CSI request field is used at least to indicate a
report of the CSI. The size of the first CSI request field may be a
prescribed value. The size of the first CSI request field may be
zero, may be one, may be two, or may be three.
[0092] The DCI format 0_1 is configured to include at least some or
all of 2A to 2G.
[0093] 2A) DCI format specification field
[0094] 2B) Frequency domain resource assignment field
[0095] 2C) Time domain resource assignment field
[0096] 2D) Frequency hopping flag field
[0097] 2E) MCS field
[0098] 2F) Second CSI request field
[0099] 2G) BWP field
[0100] The BWP field may be used to indicate the uplink BWP to
which the PUSCH scheduled by the DCI format 0_1 is mapped.
[0101] The second CSI request field is used at least to indicate a
report of the CSI. The size of the second CSI request field may be
provided based at least on a parameter ReportTriggerSize of the
higher layer.
[0102] The downlink DCI format includes at least one of or both the
DCI format 1_0 and the DCI format 1_1.
[0103] The DCI format 1_0 is configured to include at least some or
all of 3A to 3H.
[0104] 3A) DCI format specification field (Identifier for DCI
formats field)
[0105] 3B) Frequency domain resource assignment field
[0106] 3C) Time domain resource assignment field
[0107] 3D) Frequency hopping flag field
[0108] 3E) Modulation and Coding Scheme field (MCS field)
[0109] 3F) First CSI request field
[0110] 3G) PDSCH to HARQ feedback timing indicator field
[0111] 3H) PUCCH resource indicator field
[0112] The timing indication field from the PDSCH to the HARQ
feedback may be a field indicating a timing K1. In a case that the
index of the slot including the last OFDM symbol of the PDSCH is a
slot n, the index of the slot including the PUCCH or the PUSCH
including at least HARQ-ACK corresponding to the transport block
included in the PDSCH may be n+K1. In a case that the index of the
slot including the last OFDM symbol of the PDSCH is a slot n, the
index of the slot including the OFDM symbol at the head of the
PUCCH or the OFDM symbol at the head of the PUSCH including at
least HARQ-ACK corresponding to the transport block included in the
PDSCH may be n+K1.
[0113] The PUCCH resource indication field may be a field
indicating indexes of one or a plurality of PUCCH resources
included in the PUCCH resource set.
[0114] The DCI format 1_1 is configured to include at least some or
all of 4A to 4J.
[0115] 4A) DCI format specification field (Identifier for DCI
formats field)
[0116] 4B) Frequency domain resource assignment field
[0117] 4C) Time domain resource assignment field
[0118] 4D) Frequency hopping flag field
[0119] 4E) Modulation and Coding Scheme field (MCS field)
[0120] 4F) First CSI request field
[0121] 4G) PDSCH to HARQ feedback timing indicator field
[0122] 4H) PUCCH resource indicator field
[0123] 4J) BWP field
[0124] The BWP field may be used to indicate the downlink BWP to
which the PDSCH scheduled by the DCI format 1_1 is mapped.
[0125] In various aspects of the present embodiment, the number of
resource blocks indicates the number of resource blocks in the
frequency domain unless otherwise specified.
[0126] The downlink grant is used at least for scheduling a single
PDSCH in a single serving cell.
[0127] The uplink grant is used at least for scheduling a single
PUSCH in a single serving cell.
[0128] A single physical channel may be mapped to a single serving
cell. A single physical channel may be mapped to a single BWP
configured to a single carrier included in a single serving
cell.
[0129] In the terminal apparatus 1, one or a plurality of COntrol
REsource SETs (CORESETs) may be configured. The terminal apparatus
1 monitors the PDCCH in the one or plurality of control resource
sets. Here, monitoring of the PDCCH in the one or plurality of
control resource sets may include monitoring of one or a plurality
of PDCCHs corresponding to the one or plurality of control resource
sets, respectively. Note that the PDCCH may include a set of one or
a plurality of PDCCH candidates and/or one or a plurality of PDCCH
candidates. Also, monitoring of the PDCCH may include monitoring
and detecting the PDCCH and/or a DCI format transmitted via the
PDCCH.
[0130] The control resource set may indicate a time-frequency
domain to which one or a plurality of PDCCHs can be mapped. The
control resource set may be an area in which the terminal apparatus
1 monitors the PDCCH. The control resource set may include
continuous resources (Localized resources). The control resource
set may include non-continuous resources (distributed
resources).
[0131] In the frequency domain, the unit of mapping of the control
resource set may be a resource block. In the frequency domain, for
example, the unit of mapping of the control resource set may be six
resource blocks. In the time domain, the unit of mapping of the
control resource set may be an OFDM symbol. In the time domain, for
example, the unit of mapping of the control resource set may be one
OFDM symbol.
[0132] Mapping of the control resource set to the resource block
may be provided based at least on the higher layer parameter. The
higher layer parameter may include a bitmap for a Resource Block
Group (RBG). The resource block group may be provided by six
continuous resource blocks.
[0133] The number of OFDM symbols included in the control resource
set may be provided based at least on the higher layer
parameter.
[0134] A certain control resource set may be a Common control
resource set. The common control resource set may be a control
resource set configured commonly to a plurality of terminal
apparatuses 1. The common control resource set may be provided at
least based on some or all of the MIB, the first system
information, the second system information, the common RRC
signaling, and a cell ID. For example, the time resource and/or the
frequency resource of the control resource set configured to
monitor the PDCCH to be used for scheduling the first system
information may be provided based at least on the MIB.
[0135] The control resource set configured by the MIB is also
referred to as CORESET #0. CORESET #0 may be a control resource set
of index #0.
[0136] A certain control resource set may be a Dedicated control
resource set. The dedicated control resource set may be a control
resource set configured to be used exclusively for the terminal
apparatus 1. The dedicated control resource set may be provided
based at least on some or all of the dedicated RRC signaling and
values of C-RNTI.
[0137] The set of PDCCH candidates monitored by the terminal
apparatus 1 may be defined in terms of a search space. In other
words, the set of PDCCH candidates monitored by the terminal
apparatus 1 may be provided by the search space.
[0138] The search space may be configured to include one or a
plurality of PDCCH candidates at one or a plurality of Aggregation
levels. The aggregation level of the PDCCH candidates may indicate
the number of CCEs included in the PDCCH. The PDDCH candidate may
be mapped to one or a plurality of CCEs.
[0139] The terminal apparatus 1 may monitor at least one or a
plurality of search spaces in a slot in which Discontinuous
reception (DRX) is not configured. The DRX may be provided based at
least on a higher layer parameter. The terminal apparatus 1 may
monitor at least one or a plurality of Search space sets in the
slot in which the DRX is not configured.
[0140] The search space set may be configured to include at least
one or a plurality of search spaces.
[0141] Each search space set may be associated at least with one
control resource set. Each search space set may be included in one
control resource set. An index of the control resource set
associated with the search space set may be provided to each search
space set.
[0142] A physical resource of the search space includes a Control
Channel Element (CCE). The CCE includes a prescribed number of
Resource Element Groups (REGs). For example, the CCE may include
six REGs. The REG may include one Physical Resource Block (PRB)
during one OFDM symbol. In other words, the REG may be configured
to include 12 Resource Elements (REs). The PRB is also simply
referred to as a Resource Block (RB).
[0143] The PDSCH is used at least to transmit the transport block.
The PDSCH may be used at least to transmit a random access message
2 (random access response). The PDSCH may be used at least to
transmit system information including parameters used for initial
access.
[0144] In FIG. 1, the following downlink physical signals are used
for the downlink radio communication. The downlink physical signals
may not be used for transmitting information output from a higher
layer, but is used by the physical layer. [0145] Synchronization
Signal (SS) [0146] DownLink DeModulation Reference Signal (DL DMRS)
[0147] Channel State Information-Reference Signal (CSI-RS) [0148]
DownLink Phase Tracking Reference Signal (DL PTRS)
[0149] The synchronization signal is used for the terminal
apparatus 1 to establish synchronization in a frequency domain
and/or a time domain of the downlink. The synchronization signal
includes a Primary Synchronization Signal (PSS) and a Secondary
Synchronization Signal (SSS).
[0150] An SS block (SS/PBCH block) is configured to include at
least some or all of the PSS, the SSS, and the PBCH.
[0151] The DL DMRS is associated with transmission of the PBCH,
PDCCH and/or PDSCH. The DL DMRS is multiplexed to the PBCH, the
PDCCH and/or the PDSCH. The terminal apparatus 1 may use the DL
DMRS corresponding to the PBCH, the PDCCH, or the PDSCH to perform
channel compensation of the PBCH, the PDCCH, or the PDSCH.
[0152] The CSI-RS may be a signal used at least to calculate
channel state information. A pattern of the CSI-RS assumed by the
terminal apparatus may be provided at least by a higher layer
parameter.
[0153] The PTRS may be a signal used at least to compensate for
phase noise. A pattern of the PTRS assumed by the terminal
apparatus may be provided based at least on a higher layer
parameter and/or the DCI.
[0154] The DL PTRS may be associated with a DL DMRS group that
includes at least an antenna port used for one or a plurality of DL
DMRSs.
[0155] The downlink physical channel and the downlink physical
signal are also collectively referred to as the downlink signal.
The uplink physical channel and the uplink physical signal are also
collectively referred to as the uplink signal. The downlink signal
and the uplink signal are also collectively referred to as the
physical signal. The downlink signal and the uplink signal are also
collectively referred to as the signal. The downlink physical
channel and the uplink physical channel are collectively referred
to as the physical channel. The downlink physical signal and the
uplink physical signal are collectively referred to as the physical
signal.
[0156] A Broadcast CHannel (BCH), an Uplink-Shared CHannel
(UL-SCH), and a Downlink-shared CHannel (DL-SCH) are transport
channels. A channel used in a Medium Access Control (MAC) layer is
referred to as a transport channel. A unit of the transport channel
used in the MAC layer is also referred to as a transport block (TB)
or an MAC PDU. Control of the Hybrid Automatic Repeat reQuest
(HARQ) is performed for each transport block in the MAC layer. The
transport block is a unit of data that the MAC layer delivers to
the physical layer. In the physical layer, the transport block is
mapped to a codeword, and modulation processing is performed for
each codeword.
[0157] The base station apparatus 3 and the terminal apparatus 1
exchange (transmit and/or receive) higher layer signals in the
higher layer. For example, the base station apparatus 3 and the
terminal apparatus 1 may transmit and/or receive, in a Radio
Resource Control (RRC) layer, RRC signaling (a Radio Resource
Control (RRC) message and/or Radio Resource Control (RRC)
information). Also, the base station apparatus 3 and the terminal
apparatus 1 may transmit and/or receive, in the MAC layer, a MAC
Control Element (CE). Here, the RRC signaling and/or the MAC CE is
also referred to as the higher layer signaling.
[0158] The PUSCH and the PDSCH may be used at least to transmit the
RRC signaling and/or the MAC CE. Here, the RRC signaling
transmitted from the base station apparatus 3 through the PDSCH may
be signaling common to a plurality of terminal apparatuses 1 in a
serving cell. The signaling common to the plurality of terminal
apparatuses 1 in the serving cell is also referred to as common RRC
signaling. The RRC signaling transmitted from the base station
apparatus 3 through the PDSCH may be signaling dedicated to a
certain terminal apparatus 1 (also referred to as dedicated
signaling or UE specific signaling). The signaling dedicated to the
terminal apparatus 1 is also referred to as dedicated RRC
signaling. A serving cell-specific higher layer parameter may be
transmitted using the signaling common to the plurality of terminal
apparatuses 1 in the serving cell or the signaling dedicated to a
certain terminal apparatus 1. A UE-specific higher layer parameter
may be transmitted using signaling dedicated to a certain terminal
apparatus 1.
[0159] A Broadcast Control CHannel (BCCH), a Common Control CHannel
(CCCH), and a Dedicated Control CHannel (DCCH) are logical
channels. For example, the BCCH is a higher layer channel used to
transmit the MIB. Furthermore, the Common Control CHannel (CCCH) is
a higher layer channel used to transmit information common to the
plurality of terminal apparatuses 1. Here, the CCCH may be used for
a terminal apparatus 1 that is not RRC-connected, for example.
Moreover, a Dedicated Control CHannel (DCCH) is a higher layer
channel used at least to transmit dedicated control information to
the terminal apparatus 1. Here, the DCCH may be used for a terminal
apparatus 1 that is RRC-connected, for example.
[0160] The BCCH in the logical channel may be mapped to the BCH,
the DL-SCH, or the UL-SCH in the transport channel. The CCCH in the
logical channel may be mapped to the DL-SCH or the UL-SCH in the
transport channel. The DCCH in the logical channel may be mapped to
the DL-SCH or the UL-SCH in the transport channel.
[0161] The UL-SCH in the transport channel may be mapped to the
PUSCH in the physical channel. The DL-SCH in the transport channel
may be mapped to the PDSCH in the physical channel. The BCH in the
transport channel may be mapped to the PBCH in the physical
channel.
[0162] A structural example of the terminal apparatus 1 according
to the one aspect of the present embodiment will be described
below.
[0163] FIG. 4 is a schematic block diagram illustrating a structure
of the terminal apparatus 1 according to an aspect of the present
embodiment. As illustrated, the terminal apparatus 1 is configured
to include a radio transmission and/or reception unit 10 and a
higher layer processing unit 14. The radio transmission and/or
reception unit 10 is configured to include at least some or all of
an antenna unit 11, a Radio Frequency (RF) unit 12, and a baseband
unit 13. The higher layer processing unit 14 is configured to
include at least some or all of a medium access control layer
processing unit 15 and a radio resource control layer processing
unit 16. The radio transmission and/or reception unit 10 is also
referred to as a transmitter, a receiver, or a physical layer
processing unit.
[0164] The higher layer processing unit 14 outputs uplink data
(transport block) generated by a user operation or the like to the
radio transmission and/or reception unit 10. The higher layer
processing unit 14 performs processing of an MAC layer, a Packet
Data Convergence Protocol (PDCP) layer, a Radio Link Control (RLC)
layer, and an RRC layer.
[0165] The medium access control layer processing unit 15 included
in the higher layer processing unit 14 performs processing of the
MAC layer.
[0166] The radio resource control layer processing unit 16 included
in the higher layer processing unit 14 performs processing of the
RRC layer. The radio resource control layer processing unit 16
manages various types of configuration information/parameters of
the terminal apparatus 1. The radio resource control layer
processing unit 16 sets various types of configuration
information/parameters based on a higher layer signaling received
from the base station apparatus 3. In other words, the radio
resource control layer processing unit 16 sets the various
configuration information/parameters based on the information
indicating the various configuration information/parameters
received from the base station apparatus 3. Note that the
configuration information may include information related to the
processing or configurations of the physical channel, the physical
signal (that is, the physical layer), the MAC layer, the PDCP
layer, the RLC layer, and the RRC layer. The parameters may be
higher layer parameters.
[0167] The radio transmission and/or reception unit 10 performs
processing of the physical layer, such as modulation, demodulation,
coding, and decoding. The radio transmission and/or reception unit
10 demultiplexes, demodulates, and decodes a received physical
signal and outputs the decoded information to the higher layer
processing unit 14. The radio transmission and/or reception unit 10
generates a physical signal by performing modulation and coding of
data and generating a baseband signal (conversion into a
time-continuous signal) and transmits the physical signal to the
base station apparatus 3.
[0168] The RF unit 12 converts (down converts) a signal received
via the antenna unit 11 into a baseband signal by orthogonal
demodulation and removes unnecessary frequency components. The RF
unit 12 outputs a processed analog signal to the baseband unit.
[0169] The baseband unit 13 converts the analog signal input from
the RF unit 12 into a digital signal. The baseband unit 13 removes
a portion corresponding to a Cyclic Prefix (CP) from the converted
digital signal, performs a Fast Fourier Transform (FFT) on the
signal from which the CP has been removed, and extracts a signal in
the frequency domain.
[0170] The baseband unit 13 generates an OFDM symbol by performing
Inverse Fast Fourier Transform (IFFT) on the data, adds CP to the
generated OFDM symbol, generates a baseband digital signal, and
converts the baseband digital signal into an analog signal. The
baseband unit 13 outputs the converted analog signal to the RF unit
12.
[0171] The RF unit 12 removes unnecessary frequency components from
the analog signal input from the baseband unit 13 through a
low-pass filter, up converts the analog signal into a signal of a
carrier frequency, and transmits the up converted signal via the
antenna unit 11. Also, the RF unit 12 amplifies power. In addition,
the RF unit 12 may have a function of controlling transmit power.
The RF unit 12 is also referred to as a transmit power
controller.
[0172] Hereinafter, a structural example of the base station
apparatus 3 according to an aspect of the present embodiment will
be described below.
[0173] FIG. 5 is a schematic block diagram illustrating a structure
of the base station apparatus 3 according to an aspect of the
present embodiment. As illustrated, the base station apparatus 3 is
configured to include a radio transmission and/or reception unit 30
and a higher layer processing unit 34. The radio transmission
and/or reception unit 30 is configured to include an antenna unit
31, an RF unit 32, and a baseband unit 33. The higher layer
processing unit 34 is configured to include a medium access control
layer processing unit 35 and a radio resource control layer
processing unit 36. The radio transmission and/or reception unit 30
is also referred to as a transmitter, a receiver, or a physical
layer processing unit.
[0174] The higher layer processing unit 34 performs processing of
an MAC layer, a PDCP layer, an RLC layer, and an RRC layer.
[0175] The medium access control layer processing unit 35 included
in the higher layer processing unit 34 performs processing of the
MAC layer.
[0176] The radio resource control layer processing unit 36 included
in the higher layer processing unit 34 performs processing of the
RRC layer. The radio resource control layer processing unit 36
generates, or acquires from a higher node, downlink data (transport
block) mapped to a PDSCH, system information, an RRC message, an
MAC CE, and the like, and outputs the data to the radio
transmission and/or reception unit 30. Further, the radio resource
control layer processing unit 36 manages various types of
configuration information/parameters for each terminal apparatus 1.
The radio resource control layer processing unit 36 may set various
types of configuration information/parameters for each terminal
apparatus 1 via higher layer signals. In other words, the radio
resource control layer processing unit 36 transmits/broadcasts
information indicating various types of configuration
information/parameters. Note that the configuration information may
include information related to the processing or configurations of
the physical channel, the physical signal (that is, the physical
layer), the MAC layer, the PDCP layer, the RLC layer, and the RRC
layer. The parameters may be higher layer parameters.
[0177] The functionality of the radio transmission and/or reception
unit 30 is similar to the functionality of the radio transmission
and/or reception unit 10, and description thereof will thus be
omitted.
[0178] Each of the units having the reference signs 10 to 16
included in the terminal apparatus 1 may be implemented as a
circuit. Each of the units having the reference signs 30 to 36
included in the base station apparatus 3 may be implemented as a
circuit.
[0179] The terminal apparatus 1 may perform Carrier sense prior to
transmission of a physical signal. Also, the base station apparatus
3 may perform carrier sense prior to transmission of a physical
signal. The carrier sense may be to perform Energy detection on a
Radio channel. Whether the physical signal can be transmitted may
be provided based on the carrier sense performed prior to
transmission of the physical signal. In a case that the amount of
energy detected in carrier sense performed prior to transmission of
a physical signal is greater than a prescribed threshold value, for
example, the transmission of the physical channel may not be
performed, or it may be determined that the transmission is not
possible. Also, in a case that the amount of energy detected in the
carrier sense performed prior to the transmission of the physical
signal is smaller than the prescribed threshold value, the
transmission of the physical channel may be performed, or it may be
determined that the transmission is possible. Moreover, in a case
that the amount of energy detected in the carrier sense performed
prior to the transmission of the physical signal is equal to the
prescribed threshold value, the transmission of the physical
channel may be performed or may not be performed. In other words,
in a case that the amount of energy detected in the carrier sense
performed prior to the transmission of the physical signal is equal
to the prescribed threshold value, it may be determined that the
transmission is not possible, or it may be determined that the
transmission is possible.
[0180] A procedure in which whether the transmission of the
physical channel is possible based on the carrier sense is also
referred to as Listen Before Talk (LBT). A situation in which the
transmission of the physical signal is determined to be not
possible as a result of the LBT is also referred to as a busy state
or busy. For example, the busy state may be a state in which the
amount of energy detected in the carrier sense is greater than the
prescribed threshold value. In addition, the situation in which the
transmission of the physical signal is determined to be possible as
a result of the LBT is also referred to as an idle state or idle.
For example, the idle state may be a state in which the amount of
energy detected in the carrier sense is smaller than the prescribed
threshold value.
[0181] The terminal apparatus 1 may multiplex uplink control
information (UCI) to the PUCCH and transmit the PUCCH. The terminal
apparatus 1 may multiplex the UCI to the PUSCH and transmit the
PUSCH. The UCI may include at least one of downlink Channel State
Information (CSI), a Scheduling Request (SR) indicating a request
for a PUSCH resource, and a Hybrid Automatic Repeat request
ACKnowledgement (HARQ-ACK) for downlink data (a Transport block, a
Medium Access Control Protocol Data Unit (MAC PDU), a
Downlink-Shared Channel (DL-SCH), and/or a Physical Downlink Shared
Channel (PDSCH)).
[0182] In a case that downlink data is successfully decoded, an ACK
for the downlink data is generated. In a case that downlink data is
not successfully decoded, a NACK for the downlink data is
generated. The HARQ-ACK may include at least a HARQ-ACK bit
corresponding at least to one transport block. The HARQ-ACK bit may
indicate an ACKnowledgement (ACK) or a Negative-ACKnowledgement
(NACK) corresponding to one or a plurality of transport blocks. The
HARQ-ACK may include at least a HARQ-ACK codebook including one or
a plurality of HARQ-ACK bits. The fact that the HARQ-ACK bit
corresponds to one or a plurality of transport blocks may mean that
the HARQ-ACK bit corresponds to the PDSCH including the one or
plurality of transport blocks.
[0183] The HARQ-ACK may also be referred to as an ACK/NACK, HARQ
feedback, HARQ-ACK feedback, an HARQ response, a HARQ-ACK response,
HARQ information, HARQ-ACK information, HARQ control information,
and HARQ-ACK control information.
[0184] The terminal apparatus 1 may report the HARQ-ACK information
to the base station apparatus 3 using the HARQ-ACK codebook in a
slot indicated by a value of PDSCH to HARQ feedback timing
indicator field included in the DCI format 1_0 or the DCI format
1_1 corresponding to PDSCH reception. The value of the PDSCH to
HARQ feedback timing indicator field is also referred to as a
HARQ-ACK timing or K1.
[0185] In a case that a higher layer parameter
pdsch-AggregationFactor is provided to the terminal apparatus 1,
N.sub.PDSCH.sup.repeat may be a value of the
pdsch-AggregationFactor. In a case that the higher layer parameter
pdsch-AggregationFactor is not provided to the terminal apparatus
1, N.sub.PDSCH.sup.repeat may be one. The terminal apparatus 1 may
report the HARQ-ACK information for PDSCH reception from the slot
n-N.sub.PDSCH.sup.repeat+1 to the slot n using PUCCH transmission
and/or PUSCH transmission in the slot n+k. Here, k may be the
number of slots indicated by PDSCH-to-HARQ_feedback timing
indicator field included in the DCI format corresponding to the
PDSCH reception. Also, in a case that PDSCH-to-HARQ_feedback timing
indicator field is not included in the DCI format, k may be
provided by a higher layer parameter dl-DataToUL-ACK.
[0186] The scheme of the HARQ-ACK codebook may include at least a
semi-static HARQ-ACK. The semi-static HARQ-ACK is also referred to
as HARQ-ACK Type1.
[0187] A set of M.sub.A, c occasions for candidate PDSCH receptions
may be determined based at least on a set of K.sub.1 (HARQ-ACK
timing value) associated with an uplink BWP, default PDSCH time
domain resource allocation, higher layer parameter
PDSH-TimeDomainResourceAllocationList, higher layer parameter
TDD-UL-DL-ConfigurationCommon, and/or a higher layer parameter
TDD-UL-DL-ConfigDedicated.
[0188] In a case that the terminal apparatus 1 is configured to
monitor the PDCCH including the DCI format 1_0 and is configured
not to monitor the PDCCH including the DCI format 1_1, the HARQ-ACK
timing value K1 may be some or all of (1, 2, 3, 4, 5, 6, 7, and 8).
In a case that the terminal apparatus 1 is configured to monitor
the PDCCH including the DCI format 1_1, the HARQ-ACK timing value
K1 may be provided by a higher layer parameter dl-DataToUL-ACK.
[0189] The number of elements (cardinality) of M.sub.A, c is
defined by the total number M.sub.c of occasions for the PDSCH
receptions of the serving cell c corresponding to the HARQ-ACK
information bit or of occasions for the SPS PDSCH release. In other
words, M.sub.c may be the number of elements of M.sub.A, c. Also,
M.sub.c may be a codebook size of the HARQ-ACK information.
[0190] FIG. 6 is a diagram illustrating an example of a procedure
for determining a set of M.sub.A, c occasions for candidate PDSCH
receptions according to the present embodiment. The number of bits
of the HARQ-ACK information to be transmitted by the terminal
apparatus 1 may be determined in this procedure.
[0191] (600) An index j of the occasion for the candidate PDSCH
reception and/or for the SPS PDSCH release is configured to 0, and
the procedure proceeds to 601.
[0192] (601) A set B for storing the candidate PDSCH reception is
configured to be an empty set, and the procedure proceeds to
602.
[0193] (602) M.sub.A, c is configured to be the empty set, and the
procedure proceeds to 603.
[0194] (603) The number (cardinality) of the HARQ-ACK timing values
K1 included in the set of K1 is configured to be C(K.sub.1), and
the procedure proceeds to 604.
[0195] (604) The index k of the HARQ-ACK timing value K1 included
in the set of K1 is configured to be 0, and the procedure proceeds
to 605. Here, the value of K1 may be arranged in the descending
order for each serving cell. In a case that the set of K1 is (5, 6,
7), for example, the value of K.sub.1 indicated by k=0 may be
5.
[0196] (605) In a case that the index k of K1 is smaller than
C(K.sub.1), the procedure proceeds to 606. In a case that the index
k of K1 is greater than C(K.sub.1) or the same as C(K.sub.1), the
procedure proceeds to 648.
[0197] (606) In a case that mod(n.sub.U-K.sub.1, k+1,
max(2.mu..sup.UL-.mu.DL, 1))=0 is satisfied, the procedure proceeds
to 607. In a case that mod(n.sub.U-K.sub.1, k+1,
max(2.mu..sup.UL-.mu.DL, 1))=0 is not satisfied, the procedure
proceeds to 646.
[0198] (607) An index n.sub.D of the downlink slot is configured to
zero within a range of one uplink slot, and the procedure proceeds
to 608.
[0199] (608) In a case that n.sub.D is smaller than
max(2.mu..sup.DL-.mu.UL, 1), the procedure proceeds to 609. In a
case that n.sub.D is greater than max(2.mu..sup.DL-.mu.UL, 1), the
procedure proceeds to 645. Here, in a case that .mu..sub.DL is
greater than .mu..sub.UL, one uplink slot corresponds to a
plurality of downlink slots.
[0200] (609) All rows in a time domain resource allocation table
are configured to be R, and the procedure proceeds to 610.
[0201] (610) The number of elements (cardinality) of R is
configured to be C(R), and the procedure proceeds to 611.
[0202] (611) An index r in the row of R is configured to be zero,
and the procedure proceeds to 612.
[0203] (612) In a case that the slot n.sub.U is the same slot as or
a slot after a slot for the active downlink BWP change on the
serving cell c or for the active uplink BWP change on the PCell,
and the slot floor((n.sub.U-K.sub.1, k)2.mu..sup.DL-.mu.UL)+n.sub.D
is a slot before a slot for the active downlink BWP change on the
serving cell c or for the active uplink BWP change on the PCell,
613 is performed. In a case that the condition in 612 is not
satisfied, the procedure proceeds to 614 without performing 613.
The floor function is defined as a maximum integer of equal to or
less than a real number with respect to the real number.
[0204] (613) Procedure proceeds to 643.
[0205] (614) In a case that the condition in 612 is not satisfied,
the procedure proceeds to 615.
[0206] (615) In a case that r is smaller than C(R), the procedure
proceeds to 616. In a case that r is greater than or equal to C(R),
the procedure proceeds to 620.
[0207] (616) In a case that a higher layer parameter
TDD-UL-DL-ConfigurationCommon or TDD-UL-DL-ConfigDedicated is
provided to the terminal apparatus 1 and at least one symbol of the
PDSCH time domain resource derived by the row r from the slot
floor((n.sub.U-K.sub.1,
k)2.mu..sub.DL-.mu.UL)+n.sub.D-N.sub.PDSCH.sup.repeat-1 to the slot
floor((n.sub.U-K.sub.1, k)2.mu..sup.DL-.mu.UL)+n.sub.D includes the
uplink, (617) the row r is excluded from R, and the procedure
proceeds to 618. In a case that the condition in 616 is not
satisfied, the procedure proceeds to 618.
[0208] (618) The conditional statement in 616 is ended, and the
procedure proceeds to 619.
[0209] (619) r is incremented by one, and the procedure proceeds to
620.
[0210] (620) In a case that r is smaller than C(R), the procedure
proceeds to 616. In a case that r is greater than or equal to C(R),
the procedure proceeds to 621.
[0211] (621) In a case that the terminal apparatus 1 does not
provide a notification indicating Capability of receiving two or
more PDSCHs in one slot, and R is not empty, the procedure proceeds
to 622.
[0212] (622) The terminal apparatus 1 saves the union of M.sub.A, c
and the index k of K1 in M.sub.A, c and procedure proceeds to
623.
[0213] (623) j is incremented by one, and the procedure proceeds to
624.
[0214] (624) The terminal apparatus 1 may not expect to receive the
PDSCH and the SPS PDSCH release at the same time in one slot. The
procedure proceeds to 625.
[0215] (625) In a case that the condition in 621 is not satisfied,
the procedure proceeds to 626.
[0216] (626) The number of elements (Cardinality) of R is set to be
C(R), and the procedure proceeds to 627.
[0217] (627) The last and the smallest OFDM symbol index from among
the candidate PDSCH receptions R is configured to be m, and the
procedure proceeds to 628. Here, the candidate PDSCH reception may
be provided by a start and length indicator value (SLIV) included
in each row of R. Also, in a case that the terminal apparatus 1 is
scheduled to receive the PDSCH, the SLIV may be determined based at
least on a value of a Time Domain Resource assignment field
included in the DCI.
[0218] (628) In a case that R is not an empty set, the procedure
proceeds to 629. In a case that R is an empty set, the procedure
proceeds to 641.
[0219] (629) r is configured to be zero, and the procedure proceeds
to 630.
[0220] (630) In a case that r is smaller than C(R), the procedure
proceeds to 631. In a case that r is greater than or equal to C(R),
the procedure proceeds to 637.
[0221] (631) In a case that the start OFDM symbol index S of the
candidate PDSCH reception in the row r is smaller than m determined
in (627), the procedure proceeds to 632. In a case that S is
greater than or equal to m, the procedure proceeds to 635.
[0222] (632) j is saved in b.sub.r, k, nD, and the procedure
proceeds to 633. Here, b.sub.r, k, nD may be a set of occasion
indexes j for the candidate PDSCH reception r in K.sub.1, k.
[0223] (633) The row r is excluded from R, and the procedure
proceeds to 634.
[0224] (634) The union of B and b.sub.r, k is saved in B, and the
procedure proceeds to 635.
[0225] (635) The conditional statement in 631 is ended, and the
procedure proceeds to 636.
[0226] (636) r is incremented by one, and the procedure proceeds to
637.
[0227] (637) In a case that the condition in 630 is satisfied, the
procedure proceeds to 631. In a case that the condition in 630 is
not satisfied, the procedure proceeds to 638.
[0228] (638) The union of M.sub.A, c and j is saved in M.sub.A, c,
and the procedure proceeds to 639.
[0229] (639) j is incremented by one, and the procedure proceeds to
640.
[0230] (640) The last and the smallest OFDM symbol index from among
the candidate PDSCH receptions R is configured to be m, and the
procedure proceeds to 641.
[0231] (641) In a case that R is not empty, the procedure proceeds
to 629. In a case that R is empty, the procedure proceeds to
642.
[0232] (642) The conditional statement in 621 and/or 625 is ended,
and the procedure proceeds to 643.
[0233] (643) The conditional statement in 612 and/or 614 is ended,
and the procedure proceeds to 644.
[0234] (644) n.sub.D is incremented by one, and the procedure
proceeds to 645.
[0235] (645) In a case that n.sub.D is smaller than
max(2.mu..sup.DL-.mu.UL, 1), the procedure proceeds to 609. In a
case that n.sub.D is greater than or equal to
max(2.mu..sup.DL-.mu.UL, 1), the procedure proceeds to 646.
[0236] (646) The conditional statement in 606 is ended, and the
procedure proceeds to 647.
[0237] (647) k is incremented by one, and the procedure proceeds to
648.
[0238] (648) In a case that the index k of K1 is smaller than
C(K1), the procedure proceeds to 606. In a case that the index k of
K1 is greater than or equal to C(K.sub.1), the procedure is
ended.
[0239] M.sub.A, c determined by the procedure illustrated in FIG. 7
may be the number of HARQ-ACK bits transmitted by the terminal
apparatus 1.
[0240] In occasions for candidate PDSCH reception corresponding to
one or a plurality of rows of R in which b.sub.r, k, nD included in
B is the same, the terminal apparatus 1 may not expect to receive
two or more PDSCHs in the same slot.
[0241] The candidate PDSCH reception may be the candidate capable
of PDSCH reception indicated by the SLIV. The number of PDSCHs that
the terminal apparatus 1 actually receives in one slot may be a
value that is the same as or smaller than the number of candidate
PDSCH receptions.
[0242] In a case that the terminal apparatus 1 receives an SPS
PDSCH, SPS PDSCH release, or a PDSCH scheduled by the DCI format
1_0, that the terminal apparatus 1 is included in one serving cell,
that M.sub.A, c is 1, and that a higher layer parameter
PDSCH-CodeBlockGroupTransmission is provided to the terminal
apparatus 1, the terminal apparatus 1 may generate HARQ-ACK
information of only a transport block in the PDSCH or of only the
SPS PDSCH release.
[0243] In a case that the Uplink subcarrier spacings and the
Downlink subcarrier spacings are the same, the present embodiment
may be used. In a case that the Uplink subcarrier spacings and the
Downlink subcarrier spacings are different from each other, the
present embodiment may be used.
[0244] FIG. 7 is a diagram illustrating a procedure of an example
in which the terminal apparatus 1 determines a HARQ-ACK information
bit of a HARQ-ACK codebook transmitted through the PUCCH in the
present embodiment. The HARQ-ACK information bit corresponding to
M.sub.A, c determined through the procedure in FIG. 6 may be
determined through this procedure.
[0245] (700) The serving cell index c is configured to be zero, and
the procedure proceeds to 701.
[0246] (701) The index j of the HARQ-ACK information bit is
configured to be zero, and the procedure proceeds to 702.
[0247] (702) The number of serving cells including the terminal
apparatus 1 is configured to be N.sub.cells.sup.DL, and the
procedure proceeds to 703.
[0248] (703) In a case that c is smaller than N.sub.cells.sup.DL,
the procedure proceeds to 704. In a case that c is greater than or
equal to N.sub.cells.sup.DL, the procedure is ended.
[0249] (704) The occasion index m of the candidate PDSCH reception
or the SPS PDSCH release is configured to be zero, and the
procedure proceeds to 705.
[0250] (705) In a case that the index m is smaller than M.sub.c,
the procedure proceeds to 706. In a case that the index m is
greater than or equal to M.sub.c, the procedure proceeds to
728.
[0251] (706) In a case that the higher layer parameter
harq-ACK-SpatialBundlingPUCCH is not provided to the terminal
apparatus 1, that the higher layer parameter
PDSCH-CodeBlockGroupTransmission is not provided to the terminal
apparatus 1, and that the terminal apparatus 1 includes a higher
layer parameter maxNrofCodeWordsScheduledByDCI indicating reception
of two transport blocks in the active downlink BWP of the serving
cell c, (707) the HARQ-ACK information bit corresponding to the
first transport block of the cell is saved in o.sub.j.sup.ACK,
(708) j is incremented by one, then (709) a HARQ-ACK information
bit corresponding to the second transport block of the cell is
saved in o.sub.j.sup.AcK, (710) j is incremented by one, and the
procedure proceeds to 728. In a case that the condition in 706 is
not satisfied, the procedure proceeds to 711.
[0252] (711) In a case that the higher layer parameter
harq-ACK-SpatialBundlingPUCCH is provided to the terminal apparatus
1, and that the terminal apparatus 1 includes the higher layer
parameter maxNrofCodeWordsScheduledByDCI indicating reception of
two transport blocks in the active downlink BWP of the serving cell
c, (712) a binary AND operation is performed on HARQ-ACK
information bits corresponding to the first transport block and the
second transport block in the cell, the result thereof is saved in
o.sub.j.sup.ACK, (713) j is incremented by one, and the procedure
proceeds to 728. In a case that the condition in 711 is not
satisfied, the procedure proceeds to 714. Here, only in a case that
all of a plurality of input bits in the binary AND operation are 1,
the result of the binary AND operation is 1. In a case that all of
the plurality of input bits in the binary AND operation are not 1,
the result of the binary AND operation is 0. In a case that the
HARQ-ACK information bit corresponding to the first transport block
is 1 and the HARQ-ACK information bit corresponding to the second
transport block is 1, for example, the result of the binary AND
operation of the HARQ-ACK information bit corresponding to the
first transport block and the HARQ-ACK information bit
corresponding to the second transport block is 1.
[0253] (714) In a case that the higher layer parameter
PDSCH-CodeBlockGroupTransmission is provided to the terminal
apparatus 1, and that N.sub.HARQ-ACK, c.sup.CBG/TB, max CBGs are
provided by the higher layer parameter
maxCodeBlockGroupsPerTransportBlock in the serving cell c, the
procedure proceeds to 715. In a case that the condition in 814 is
not satisfied, the procedure proceeds to 725. Here, N.sub.HARQ-Ack
c.sup.CBG/TB, max may be the maximum number of CBGs in one
transport block in the serving cell c.
[0254] (715) The CBG index n.sub.CBG is configured to be zero, and
the procedure proceeds to 716.
[0255] (716) In a case that n.sub.CBG is smaller than
N.sub.HARQ-Ack c.sup.CBG/TB, max the procedure proceeds to 717. In
a case that n.sub.CBG is greater than or equal to N.sub.HARQ-AGK,
c.sup.CBG/TB, max the procedure proceeds to 722.
[0256] (717) The HARQ-ACK information bits corresponding to
n.sub.CBG CBGs of the first transport block is saved in
o.sub.j+nCBG.sup.AcK, and the procedure proceeds to 718.
[0257] (718) In a case that the terminal apparatus 1 is configured
to receive two transport blocks in the downlink BWP of the serving
cell c by the higher layer parameter
maxNrofCodeWordsScheduledByDCI, (719) the HARQ-ACK information bits
corresponding to n.sub.CBG CBGs of the second transport is saved in
o.sub.j+nCBG+nmax.sup.ACK, the conditional statement in 720 is
ended, and the procedure proceeds to 721. In a case that the
condition in 718 is not satisfied, the procedure proceeds to
721.
[0258] (721) n.sub.CBG is incremented by one, and the procedure
proceeds to 722.
[0259] (722) In a case that n.sub.CBG is smaller than
N.sub.HARQ-ACK, c.sup.CBG/TB, max, the procedure proceeds to 718.
In a case that n.sub.CBG is greater than or equal to
N.sub.HARQ-AGK, c.sup.CBG/TB, max, the procedure proceeds to
723.
[0260] (723) j+N.sub.TB, c.sup.DLN.sub.HARQ-ACK, c.sup.CBG/TB, max
is HARQ-ACK, is saved in j, and the procedure proceeds to 724.
[0261] (724) In a case that condition in 706, 711, and/or 714 is
not satisfied, the procedure proceeds to 725.
[0262] (725) The HARQ-ACK information bit in the serving cell c is
saved in o.sub.j.sup.ACK, and the procedure proceeds to 726.
[0263] (726) j is incremented by one, and the procedure proceeds to
727.
[0264] (727) The conditional statement in 706, 711, 714, and/or 724
is ended, and the procedure proceeds to 728.
[0265] (728) m is incremented by one, and the procedure proceeds to
729.
[0266] (729) In a case that the index m is smaller than M.sub.c,
the procedure proceeds to 706. In a case that the index m is
greater than or equal to M.sub.c, the procedure proceeds to
730.
[0267] (730) c is incremented by one, and the procedure proceeds to
731.
[0268] (731) In a case that c is smaller than N.sub.cells.sup.DL,
the procedure proceeds to 704. In a case that c is greater than or
equal to N.sub.cells.sup.DL, the procedure is ended.
[0269] FIG. 8 is a diagram illustrating a method by which the
terminal apparatus 1 determines a HARQ-ACK information bit of a
transmitted HARQ-ACK codebook according to an aspect of the present
embodiment.
[0270] In a table 810, the horizontal axis 811 represents a slot
for the PDSCH, and the vertical axis 812 represents a slot for
HARQ-ACK information.
[0271] For example, a set of K1 (HARQ-ACK timing values) is set to
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11] by the higher layer
parameter. HARQ-ACK codebooks 821, 822, and 825 may be determined
based at least on the set of the K1. Each bit of the HARQ-ACK
codebooks may correspond to candidate PDSCH reception to be
associated therewith. For example, in the HARQ-ACK codebook 821,
the HARQ-ACK information bit 820 corresponds to a candidate PDSCH
reception of the slot #15 to be associated by a HARQ-ACK timing
value K1=5.
[0272] The PDSCH 800 is scheduled in the slot #8, and the HARQ-ACK
information bit corresponding to the PDSCH 800 is included in the
HARQ-ACK codebook 825 by the indication of the HARQ-ACK timing
value K1=6. The PDSCH 802 is scheduled in the slot #13, and the
HARQ-ACK information bit corresponding to the PDSCH 802 is included
in the HARQ-ACK codebook 825 by the indication of the HARQ-ACK
timing value K1=1. The HARQ-ACK codebook 825 includes the HARQ-ACK
information bits corresponding to the PDSCH 800 and the PDSCH 802
and is transmitted in the slot #14 via the PUCCH 803 or the PUSCH
803. The PDSCH 801 is scheduled in the slot #13, and the HARQ-ACK
information bit corresponding to the PDSCH 800 is included in the
HARQ-ACK codebook 822 by the indication of the HARQ-ACK timing
value K1=7 and is transmitted in the slot #18 via the PUCCH 804 or
the PUSCH 804.
[0273] Hereinafter, a semi-static HARQ-ACK (first generation
method) in the related art using a first HARQ-ACK codebook will be
described using the HARQ-ACK codebook 822 in the slot #18 as an
example. In the HARQ-ACK codebook 822, the HARQ-ACK information bit
823 is enabled (ACK or NACK) in a manner corresponding to the PDSCH
801. In the HARQ-ACK codebook 822, bits other than the HARQ-ACK
information bit 823, that is, bits not corresponding to the PDSCH
are set to be disabled (fixed to the NACK). For example, the
HARQ-ACK information bit 824 is fixed to the NACK.
[0274] The fact that the PDSCH and the HARQ-ACK codebook are
associated based on the HARQ-ACK timing may mean that the slot (an
OFDM symbol or timing) in which the HARQ-ACK codebook is
transmitted coincides with a slot (an OFDM symbol or a timing)
indicated by the value of the PDSCH to HARQ feedback timing
indicator field of the DCI format scheduling the PDSCH.
[0275] The fact that the PDSCH and the HARQ-ACK codebook are not
associated based on the HARQ-ACK timing may mean that the slot (the
OFDM symbol or the timing) in which the HARQ-ACK codebook is
transmitted does not coincide with the slot (the OFDM symbol or the
timing) indicated by the value of the PDSCH to HARQ feedback timing
indicator field of the DCI format scheduling the PDSCH.
[0276] In the first generation method, the HARQ-ACK information for
a PDSCH may be transmitted in the HARQ-ACK codebook to be
transmitted in a slot indicated by K1. The K1 may be indicated by
the DCI format. The PDSCH may be scheduled based at least on the
DCI format.
[0277] In the first generation method, the HARQ-ACK information for
the PDSCH may not be transmitted (may be set to the NACK) in the
HARQ-ACK codebook to be transmitted in a slot other than the slot
indicated by the K1.
[0278] In the first generation method, the HARQ-ACK information for
the PDSCH may not be transmitted (may be set to the NACK) in the
HARQ-ACK codebook to be transmitted in a slot that is not indicated
by the K1.
[0279] In a second generation method, the HARQ-ACK information for
a PDSCH may be transmitted in the HARQ-ACK codebook to be
transmitted in a slot indicated by K1. The K1 may be indicated by
the DCI format. The PDSCH may be scheduled based at least on the
DCI format.
[0280] In the second generation method, the HARQ-ACK information
for the PDSCH may be transmitted in the HARQ-ACK codebook to be
transmitted in a slot other than the slot indicated by the K1.
[0281] In the second generation method, the HARQ-ACK information
for the PDSCH may be transmitted in the HARQ-ACK codebook to be
transmitted in a slot that is not indicated by the K1.
[0282] In the second generation method, HARQ-ACK information for
the PDSCH may be transmitted in a slot other than the slot
indicated by the K1 and in a slot subsequent to the slot in which
the PDSCH is transmitted.
[0283] For the second generation method, a configuration of the
slot in which the PDSCH is transmitted may take PDSCH processing
Capability of the terminal apparatus 1 into consideration.
[0284] The HARQ-ACK codebook generated based on the first
generation method may be a first HARQ-ACK codebook. The HARQ-ACK
codebook generated based on the second generation method may be a
second HARQ-ACK codebook.
[0285] Which of the first generation method and the second
generation method the transmission of the HARQ-ACK information is
provided by may be provided based at least on a prescribed value of
a prescribed higher layer parameter. Which of the first generation
method and the second generation method the HARQ-ACK information is
provided by may be indicated by a value of a prescribed higher
layer parameter.
[0286] Which of the first generation method and the second
generation method the transmission of the HARQ-ACK information is
provided by may be triggered by a prescribed value of a prescribed
DCI format field. The prescribed value of the prescribed DCI format
field may be referred to as a switching trigger.
[0287] Which of the first generation method and the second
generation method the HARQ-ACK information of the PDSCH is provided
by may be provided based at least on the switching trigger in the
first DCI format scheduling the PDSCH. The first DCI format may be
any of the DCI format 1_0 and the DCI format 1_1.
[0288] Which of the first generation method and the second
generation method the transmission of the HARQ-ACK information of
the PDSCH is provided by may be triggered by the switching trigger
in the second DCI format. The second DCI format may be different
from the first DCI format scheduling the PDSCH. The second DCI
format may be a DCI format used to determine which of the first
generation method and the second generation method the transmission
of the HARQ-ACK information of the PDSCH is provided by. The second
DCI format may be a dedicated DCI format to determine which of the
first generation method and the second generation method the
transmission of the HARQ-ACK information of the PDSCH is provided
by. The second DCI format may be a DCI format scheduling a PDSCH
before the PDSCH scheduled by the first DCI format.
[0289] The second DCI format may not schedule the PDSCH. In other
words, the second DCI format may not schedule the PDSCH although
the second DCI format indicates a PUCCH resource used to transmit
the HARQ-ACK information. The field included in the second DCI
format may include the same field as the field included in the
first DCI format. The size of the second DCI format may be equal to
the size of the first DCI format.
[0290] The value of the PDSCH to HARQ feedback timing indicator
field included in the second DCI format may indicate a difference
(offset) from the slot to which the PDCCH including the second DCI
format is mapped to the slot to which at least the head OFDM symbol
of the PUCCH resource indicated by the second DCI format is
mapped.
[0291] The value of the DCI format specification field included in
the second DCI format may be set to indicate that the second DCI
format is a downlink DCI format.
[0292] The value of the DCI format specification field included in
the second DCI format may be set to indicate that the second DCI
format is an uplink DCI format.
[0293] A bit of the frequency domain resource assignment field
included in the second DCI format may be set to a prescribed value.
For example, setting the bit to the prescribed value may mean that
all the bits of the frequency domain resource assignment field are
set to 0. Further, setting the bit to the prescribed value may mean
that all the bits of the frequency domain resource assignment field
are set to 1.
[0294] A bit of the time domain resource assignment field included
in the second DCI format may be set to a prescribed value. For
example, setting the bit to the prescribed value may mean that all
the bits of the time domain resource assignment field are set to 0.
Also, setting the bit to the prescribed value may mean that all the
bits of the time domain resource assignment field are set to 1.
[0295] A bit of the MCS field included in the second DCI format may
be set to a prescribed value. For example, setting the bit to the
prescribed value may mean that all the bits of the MCS field are
set to 0. In addition, setting the bit to the prescribed value may
mean that all the bits of the MCS field are set to 1.
[0296] In generation of the HARQ-ACK information codebook, the
transmission of which is indicated based at least on the second DCI
format, a set of K1 for the second DCI format may be used. The set
of K1 for the second DCI format may be configured by a higher layer
parameter. The set of K1 for the second DCI format may be different
from the set of K1 for the first DCI format. The set of K1 for the
first DCI format may be used at least for the HARQ-ACK information
codebook generated by the first generation method.
[0297] The field included in the second DCI format may be used at
least to indicate the set of K1 for the second DCI format. The set
of K1 for the second DCI format may be used to generate the
HARQ-ACK information codebook, the transmission of which is
indicated based at least on the second DCI format. In the terminal
apparatus 1, a plurality of sets of K1 for the second DCI format
may be configured.
[0298] The sets of K1 may be provided based at least on a
transmission time interval of the HARQ-ACK information. The sets of
K1 may be provided for each configuration of the transmission time
interval of the HARQ-ACK information. The transmission time
interval of the HARQ-ACK information may be an interval at which
different HARQ-ACK information can be transmitted. The transmission
time interval of the HARQ-ACK information may correspond to a unit
of the value of K1. In a case that the transmission time interval
of the HARQ-ACK information is one slot, for example, the unit of
the value of K1 may be one slot. Also, in a case that the
transmission time interval of the HARQ-ACK information is 7 OFDM
symbols, the unit of the value of K1 may be 7 OFDM symbols.
[0299] A licensed frequency band may be a frequency band
exclusively allocated to run a wireless communication network (LTE
and NR, for example). An unlicensed frequency band may be a
frequency band reserved for an unlicensed communication network
(wireless LAN, for example). As licensed operation, wireless
communication may be performed exclusively using the licensed
frequency band. As unlicensed operation, wireless communication may
be performed by coexisting with a different unlicensed
communication network and sharing the unlicensed frequency
band.
[0300] Which of the first generation method and the second
generation method the transmission of the HARQ-ACK information is
provided by may be selected based at least on a frequency band type
of the radio access. Which of the first generation method and the
second generation method the transmission of the HARQ-ACK
information is provided by may be selected depending on the
frequency band type of the radio access. Here, the frequency band
type of the radio access may indicate the licensed frequency band
or the unlicensed frequency band. In a case that the frequency band
of the radio access is the licensed frequency band, for example,
the terminal apparatus 1 may transmit the HARQ-ACK information
using the first generation method. In a case that the frequency
band of the radio access is the unlicensed frequency band, the
terminal apparatus 1 may transmit the HARQ-ACK information using
the second generation method.
[0301] Which of the first generation method and the second
generation method the transmission of the HARQ-ACK information is
provided by may be selected based at least on the operation type of
the radio access. Which of the first generation method and the
second generation method the transmission of the HARQ-ACK
information is provided by may be selected depending on the
operation type of the radio access. Here, the operation type of the
radio access may indicate licensed operation or unlicensed
operation. In a case that the operation type of the radio access is
licensed operation, for example, the terminal apparatus 1 may
transmit the HARQ-ACK information using the first generation
method. In a case that the operation type of the radio access is
unlicensed operation, the terminal apparatus 1 may transmit the
HARQ-ACK information using the second generation method.
[0302] The switching between the first generation method and the
second generation method may be switching between the first
HARQ-ACK codebook and the second HARQ-ACK codebook.
[0303] Various aspects of apparatuses according to an aspect of the
present embodiment will be described below.
[0304] (1) In order to achieve the aforementioned object, aspects
of the present invention provide the following measures. In other
words, a first aspect of the present invention provides a terminal
apparatus including a receiver configured to receive a PDCCH and
receive a PDSCH scheduled based at least on the PDCCH, and a
transmitter configured to select either a first generation method
or a second generation method as a method for generating a HARQ-ACK
codebook and report (transmit) the HARQ-ACK codebook including
HARQ-ACK information corresponding to the PDSCH via a PUCCH or a
PUSCH based on a timing indicated by a value set to certain
information, in which the HARQ-ACK codebook is a sequence of
HARQ-ACK information bits corresponding to one or a plurality of
the PDSCHs, the transmitter determines the HARQ-ACK codebook
including at least a HARQ-ACK information bit corresponding to the
PDSCH, in the HARQ-ACK codebook, as the first generation method, a
HARQ-ACK information bit is set to an NACK, the HARQ-ACK
information bit corresponding to a PDSCH that is not associated
with the HARQ-ACK codebook according to a HARQ-ACK timing based on
the certain information, and, in the HARQ-ACK codebook, as the
second generation method, a part or an entirety of a plurality of
the HARQ-ACK information bits are set as valid HARQ-ACK
information, the plurality of the HARQ-ACK information bits
corresponding to the PDSCH that is not associated with the HARQ-ACK
codebook according to the HARQ-ACK timing based on the certain
information.
[0305] (2) A second aspect of the present invention provides a
terminal apparatus in which switching between the first generation
method and the second generation method may be indicated based at
least on a higher layer parameter, a trigger by a DCI, an operation
type of a radio access, or a frequency band type of a radio
access.
[0306] (3) A third aspect of the present invention provides a
terminal apparatus in which switching between the first generation
method and the second generation method may be indicated based on a
prescribed higher layer parameter and/or a prescribed value of a
certain higher layer.
[0307] (4) A fourth aspect of the present invention provides a
terminal apparatus in which switching between the first generation
method and the second generation method may be indicated based on
the PDCCH and/or a DCI included in a different PDCCH.
[0308] (5) A fifth aspect of the present invention provides a
terminal apparatus in which switching between the first generation
method and the second generation method may be indicated based on
an operation type (either a licensed operation or an unlicensed
operation) of a radio access.
[0309] (6) A sixth aspect of the present invention provides a
terminal apparatus in which switching between the first generation
method and the second generation method may be indicated based on a
frequency band type (either a frequency band to be allocated to a
licensed operation or a frequency band to be allocated to an
unlicensed operation) of a radio access.
[0310] (7) A seventh aspect of the present invention provides a
base station apparatus including a transmitter configured to
transmit a PDCCH and transmit a PDSCH scheduled based at least on
the PDCCH, and a receiver configured to select either a first
reception processing method or a second reception processing method
as a method for receiving a HARQ-ACK codebook and receive the
HARQ-ACK codebook including HARQ-ACK information corresponding to
the PDSCH via a PUCCH or a PUSCH based on a timing indicated by a
value set to certain information, in which the HARQ-ACK codebook is
a sequence of HARQ-ACK information bits corresponding to one or a
plurality of the PDSCHs, in the HARQ-ACK codebook, as the first
reception processing method, a HARQ-ACK information bit is set to
an NACK, the HARQ-ACK information bit corresponding to a PDSCH that
is not associated with the HARQ-ACK codebook according to a
HARQ-ACK timing based on the certain information, and, in the
HARQ-ACK codebook, as the second reception processing method, a
part or an entirety of a plurality of the HARQ-ACK information bits
are set as valid HARQ-ACK information, the plurality of the
HARQ-ACK information bits corresponding to the PDSCH that is not
associated with the HARQ-ACK codebook according to the HARQ-ACK
timing based on the certain information.
[0311] Each of the program running on a base station apparatus 3
and a terminal apparatus 1 according to the present invention may
be a program (a program that causes a computer to function) that
controls a Central Processing Unit (CPU) and the like, in such a
manner as to implement the functions of the aforementioned
embodiment according to the present invention. Also, the
information handled in these apparatuses is temporarily loaded into
a Random Access Memory (RAM) while being processed, is then stored
in a Hard Disk Drive (HDD) and various types of Read Only Memory
(ROM) such as a Flash ROM, and is read, modified, and written by
the CPU, as necessary.
[0312] Note that the terminal apparatus 1 and the base station
apparatus 3 according to the aforementioned embodiment may be
partially implemented by a computer. In such a case, a program for
implementing such control functions may be recorded on a
computer-readable recording medium to cause a computer system to
read and execute the program recorded on this recording medium.
[0313] Note that it is assumed that the "computer system" mentioned
here refers to a computer system built into the terminal apparatus
1 or the base station apparatus 3, and the computer system includes
an OS and hardware components such as a peripheral device.
Furthermore, the "computer-readable recording medium" refers to a
portable medium such as a flexible disk, a magneto-optical disk, a
ROM, a CD-ROM, and a storage device such as a hard disk built into
the computer system.
[0314] Moreover, the "computer-readable recording medium" may
include a medium that dynamically retains the program for a short
period of time, such as a communication wire that is used to
transmit the program over a network such as the Internet or over a
communication line such as a telephone line, and a medium that
retains the program for a certain period of time, such as a
volatile memory within the computer system which functions as a
server or a client in a case that the program is transmitted via
the communication wire. Furthermore, the aforementioned program may
be configured to implement part of the functions described above,
and also may be configured to be capable of implementing the
functions described above in combination with a program already
recorded in the computer system.
[0315] Furthermore, the base station apparatus 3 according to the
aforementioned embodiment may be achieved as an aggregation
(apparatus group) including a plurality of apparatuses. Each of the
apparatuses included in such an apparatus group may include each
function, or some or all portions of each functional block of the
base station apparatus 3 according to the aforementioned
embodiment. As the apparatus group, it is only necessary to have a
complete set of functions or functional blocks of the base station
apparatus 3. Moreover, the terminal apparatus 1 according to the
aforementioned embodiment can also communicate with the base
station apparatus as the aggregation.
[0316] Also, the base station apparatus 3 according to the
aforementioned embodiment may be an Evolved Universal Terrestrial
Radio Access Network (EUTRAN) and/or a NextGen RAN (NG-RAN or NR
RAN). Moreover, the base station apparatus 3 according to the
aforementioned embodiment may have some or all of the functions of
a higher node for an eNodeB and/or a gNB.
[0317] Also, some or all portions of each of the terminal apparatus
1 and the base station apparatus 3 according to the aforementioned
embodiment may be implemented as an LSI which is a typical
integrated circuit or may be implemented as a chip set. The
functional blocks of each of the terminal apparatus 1 and the base
station apparatus 3 may be individually implemented as a chip, or
some or all of the functional blocks may be integrated into a chip.
A circuit integration technique is not limited to the LSI, and may
be implemented with a dedicated circuit or a general-purpose
processor. Moreover, in a case that with advances in semiconductor
technology, a circuit integration technology with which an LSI is
replaced appears, it is also possible to use an integrated circuit
based on the technology.
[0318] In addition, although the aforementioned embodiments have
described the terminal apparatus as an example of a communication
apparatus, the present invention is not limited to such a terminal
apparatus, and is applicable to a terminal apparatus or a
communication apparatus that is a stationary type or a non-movable
type electronic apparatus installed indoors or outdoors, for
example, such as an AV device, a kitchen device, a cleaning or
washing machine, an air-conditioning device, office equipment, a
vending machine, and other household appliances.
[0319] Although, the embodiments of the present invention have been
described in detail above referring to the drawings, the specific
configuration is not limited to the embodiments and includes, for
example, design changes within the scope not depart from the gist
of the present invention. Furthermore, various modifications are
possible within the scope of claims, and embodiments that are made
by suitably combining technical means disclosed according to the
different embodiments are also included in the technical scope of
the present invention. Furthermore, a configuration in which
elements described in the respective embodiments and having
mutually the same effects, are substituted for one another is also
included.
* * * * *